*{
  margin: 0;
  padding: 0;
}
.header {
  background-color: #ce0000;
  height: 50px;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.shuxian {
  width: 2px;
  height: 17px;
  background-color: white;
}

.xuexi, .wode {
  color: white;
}

.diyike {
  color: gray;
}
.diyike{
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.kaixue,.shuxian,.wode{
  margin-right: 10px;
}
.kaixue {
  height: 20px;
  border: 1px solid white;
  border-radius: 50px;
  background-color: white;
}
.top_menu_list a{
  text-decoration: none;
  color: black;
}
.top_menu_list{
  height: 30px;
  background-color: #c1c6ca;
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.content_list{
  margin: 15px;
}
.title{
  margin-bottom: 10px;
}
.item_info{
  font-size: 13px;
  color: #a3a3ac;
  margin-bottom: 25px;
}
.zhiding{
  color: red;
  border: 1px solid red;
}

.images img{
  width: 300px;
  height: 150px;
  margin-right: 20px;
}
.images{
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 10px;
}
.guanggao{
  border: 1px solid #a3a3ac;
}